CN102779926B - Waterproof watch patch LED (light emitting diode) lamp with high-contract ratio - Google Patents

Abstract

The invention discloses a high-contrast waterproof surface-mounted LED lamp, which comprises: a housing provided with a reflective cup (1), a PCB board (12) provided on the lower surface of the housing, and an LED provided in the reflective cup (10). Chip (1) and light guide encapsulant (4). The shell is composed of the lower light-colored layer (8) and the upper dark-colored layer (9); the upper surface of the PCB (12) and the outer surface of the light-colored layer (8) of the shell are provided with black waterproof Sealant (11). The lower layer of the inner surface of the reflective cup of the present invention is a light-colored layer and the upper layer is a dark-colored layer, which can prevent external light from interfering with the brightness of the LED chip, so that the contrast of the product display is enhanced. In addition, the black waterproof sealant provided makes the shell black in appearance, so as to keep the brightness of the LED chips at the best effect. An effective waterproof effect can also be obtained.

Description

High-contrast waterproof surface-mount LED lights

technical field

The invention relates to a surface-mounted LED lamp, in particular to a high-contrast waterproof surface-mounted LED lamp.

Background technique

With the rapid popularization of LED lights, it has directly led to the increase of market sales and the continuous reduction of costs, which brings good prospects for the promotion of higher contrast and higher resolution displays. Existing LED lamps generally include: a plastic shell with a reflector, a packaging PCB located on the back of the plastic shell, an LED chip electrically connected to the PCB, and a light-guiding encapsulant in the reflector.

In order to improve the contrast of the display, the traditional surface mount LED lights generally have the following methods:

1. White shell silk screen black surface - silk screen black coating 3 on the top surface of the white plastic shell 2, then the surface of the white reflector 5 and the black coating 3 on the top surface form a chromatic contrast to increase the contrast of the product display, The reflective cup 5 is also provided with an LED chip 1 and a light guide encapsulant 4 , as shown in FIG. 1 .

Disadvantage: Since the surroundings of the LED chip 1 and the inner surface of the reflector 5 are all white, the surface of these white plastics will reflect external light, thereby reducing the contrast of the product display.

2. All-black shell — Use black plastic instead of the original white plastic to inject the shell, so that the entire shell 6 and the surface of the reflector 5 are black to enhance the contrast of the product display, as shown in Figure 2.

Disadvantage: Since the surface of the reflective cup 5 inside the LED chip 1 is also black, the light emitted by the LED chip cannot be well reflected from the surface of the black reflective cup, which greatly reduces the light output brightness of the LED. In order to solve the problem of low brightness, some manufacturers increase the brightness of LED by increasing the LED current, but this violates the original intention of using LED to save power, which also increases the heat emission of the product and affects the life of the product.

3. Outer black and inner white shell - use black plastic injection molded shell 6, coupled with reflective cup lining 7 injected with white material, which makes the periphery and top of the reflective cup lining black, while the surface of reflective cup lining 7 is white, This can effectively improve the contrast without reducing the light output brightness of the LED chip, as shown in FIG. 3 .

Disadvantages: extraneous light will be reflected from the surface of the reflector, which will reduce the contrast. Also due to

It is a three-layer synthetic structure, which is difficult to achieve the ideal waterproof effect. Generally, manufacturers will only use it on products that do not require high water resistance, and the applicability is low.

How to design a waterproof surface-mount LED lamp with high contrast, low energy consumption and high applicability is a technical problem that needs to be solved urgently in the industry.

Contents of the invention

In order to solve the above technical problems, the present invention proposes a high-contrast waterproof surface-mounted LED lamp with high contrast, low energy consumption and high applicability.

The high-contrast waterproof surface-mounted LED lamp proposed by the present invention includes: a housing provided with a reflective cup, a PCB board disposed on the lower surface of the housing, an LED chip disposed in the reflective cup, and light-guiding packaging glue. The shell is composed of a lower light-colored layer and an upper dark-colored layer; the upper surface of the PCB board and the outer surface of the light-colored layer of the shell are provided with a black waterproof sealant.

Wherein, the light-colored layer can be one of white layer, light yellow layer or light gray layer.

The dark layer can be one of black layer, dark blue layer, dark gray layer or dark brown layer.

The shell with the reflective cup of the present invention is composed of the light-colored layer of the lower layer and the dark-colored layer of the upper layer. Dark layer. When the LED chip emits light, the bottom surface of the reflector cup and the lower light-colored surface will reflect the light. External light generally can only irradiate the dark surface of the upper layer of the reflector (but does not reflect light), and is not easy to irradiate the light-colored surface of the lower layer, so that the external light will not interfere with the brightness of the LED chip, so that the contrast of the product display be strengthened. In addition, a black waterproof sealant is provided on the upper surface of the PCB board and the outer surface of the light-colored layer of the shell. These sealants cover all the outer surface of the light-colored layer of the shell, so that it is black when viewed from the upper surface and surroundings of the shell, but skillfully retain the white reflective part around the LED and the lower part of the reflector cup, so that the LED The light output brightness of the chip is kept at the best effect. Since the upper and lower joints of the shell, the exposed interlayer wires of the LED chips and the bottom part are completely covered by the waterproof sealant, the waterproof performance is guaranteed.

Description of drawings

Figure 1 is a cross-sectional view of the "white shell silk screen black surface" LED lamp;

Figure 2 is a cross-sectional view of the "full black shell" LED lamp;

Figure 3 is a cross-sectional view of the "black outside and white inside" LED lamp;

Fig. 4 is a cross-sectional view of an LED lamp according to a preferred embodiment of the present invention.

Detailed ways

As shown in Figure 4, an embodiment of a high-contrast waterproof surface-mounted LED lamp proposed by the present invention includes: a plastic casing provided with a reflector 1, a PCB board 12 arranged on the lower surface of the casing, and a plastic casing arranged on the reflector cup 1. LED chip 1 in 10, the LED chip is electrically connected with the PCB board. The reflective cup 10 is also filled with a light-guiding encapsulant 4 . The shell of the present invention is formed by superimposing and compounding the light-colored layer 8 of the lower layer and the dark-colored layer 9 of the upper layer. A black waterproof sealant 11 is provided on the upper surface of the PCB board 12 and the outer surface of the light-colored layer 8 of the casing. In this embodiment, the light-colored layer 8 is a white layer, and other light-colored layers, such as a light yellow layer or a light gray layer, can also be selected as required. The dark layer 9 is a black layer, and other dark layers can also be selected as required, such as, dark blue layer, dark gray layer or dark brown layer or the like.

The lower layer of the inner surface of the reflective cup of the present invention is a light-colored layer, and the upper layer is a dark-colored layer. When the LED chip emits light, the bottom surface of the reflector cup and the lower light-colored surface will reflect the light. External light generally can only irradiate the dark surface of the upper layer of the reflector (but does not reflect light), and is not easy to irradiate the light-colored surface of the lower layer, so that the external light will not interfere with the brightness of the LED chip, so that the contrast of the product display be strengthened. In addition, the black waterproof sealant provided makes the shell black in appearance, so as to keep the brightness of the LED chips at the best effect. Since the upper and lower joints of the shell, the exposed interlayer wires of the LED chips and the bottom part are completely covered by the waterproof sealant, the waterproof performance is guaranteed.

The above specific embodiments are only used to illustrate the structure of the present invention. Those skilled in the art can make various modifications and changes under the conception of the present invention, and these modifications and changes are all included in the protection scope of the present invention.

Claims (3)

1. the waterproof Surface Mount LED of a high-contrast, comprise the shell being provided with reflector (10), the pcb board being located at shell lower surface (12), be located at LED chip (1) in reflector (10) and guide-lighting packaging plastic (4), it is characterized in that, described shell is composited by the bleached bed (8) of lower floor and the dark layer (9) on upper strata; when described LED chip (1) is luminous, light can reflect away by bleached bed (8) surface of the lower surface of reflector (10) and lower floor, and ambient light can only be irradiated to dark layer (9) surface on reflector upper strata and can not be irradiated to bleached bed (8) surface of lower floor;the outer surface of described pcb board (12) upper surface and shell bleached bed (8) is provided with black waterproof gasket cement (11), the interlayer line that the joint portion of shell bleached bed (8) and dark layer (9), LED chip expose by this black waterproof gasket cement and bottom part cover completely.

2. the waterproof Surface Mount LED of high-contrast as claimed in claim 1, is characterized in that, described bleached bed (8) is white layer, the one of yellowish chromatograph or light gray chromatograph.

3. the waterproof Surface Mount LED of high-contrast as claimed in claim 1, is characterized in that, described dark layer (9) is black layer, the one of deep blue layer, dark-grey chromatograph or dark brown chromatograph.